Typewriting machine



Aug. 21, 1945. ,1; J. KITTEL 2,383,259

TYPEWRITING MACHINE Original Filed July 5, 1943 5 Sheets-Sheet 1INVENTOR JOHN JI KITTEL Aug. 21, 1945. J. J. KITTEL TYPEWRITING- MACHINEOriginal Filed July 5, 1943 5 Sheets-Sheet 2 dis INVENTOR V J'OHNJTK/TTEL BY 6% Wu A ATTORNEYS Aug. 21,1945. J. J. KITTEL TYBEWRITINGMACHINE Original Filed July 3, 1943' 5 Sheets-Sheet 4 L M W m T W E @Nwmw WK Y m g ml m ,1. wE Q A RN 0 %\N J 6 saw RN mwm "w "n.

mmw lilllll. m w QNW m k i Tb M wmw N N\ =51 nun u l u u mn w Q9 mm \MM1 N. Wad 9E q 3H1, Q fig Aug. 21, 1945. J. J. KITTEL TYPEWRITING MACHINEOriginal Filed July 3, 1943 5 Sheets-Sheet 5 .ing application SerialPatented Aug. 21 1945 mawnrrma, MACHINE I John Joseph Kittel, St.Albans, N. Y., assignor to Royal Typewriter Company, Inc., New York, N.Y., a corporation of New York Original application July 3, 1943, SerialNo. 493,450. Divided and this application March 4, 1944, Serial No.525,059

14 Claims.

This invention. relates to typewriting or like machines, and moreparticularly to machines of this class in which mechanism usuallyoperated by manual effort is operated by power supplied by a motor ormotors, under manual control.

This application is a division of my copend- Number 493,450, filed July3, 1943. 7

An object of the invention is to provide a power operated typewriter orlike machine in which the power supplying and manual control mechanismis so arranged and so interconnected with other parts of a standard ormore nearly standard kind customarily embodied in manually operatedtypewriters that the power and control mechanism may be operativelyassociated with such other parts with a minimum of modification of thebasic machine construction.

Another object is to provide a machine of the class referred to withimproved power drive mechanism for actuating, under manual control,parts performing usual typewriter functions, especially case shifting.

moving it to one of its positions.

. actuating mechanism and carriage drive escape- Figure '7 is a detailvertical section on the line f 1-1 of Figure 6 showing a pawl andratchet one way drive construction, drawn on an enlarged scale;

Figure 8 is a detail view in elevation showing a cam roller detentmechanism as viewed when looking in the direction of the arrow 8 inFigure 6; 1

. Figure 9 is a fragmentary view partly in elevation and partly invertical section, fore and aft Another object is to provide easeshifting mechanism of the character stated in which the effort formoving the shifting element to one of its positions is transmittedthrough a fluid coupling.

A further object is to provide an improved arrangement of driveconnections for transmitof the machine, showing the case shift mechanismwith a shiftable type bar segment in lower case position;

Figure 10 is a fragmentary vertical sectional view taken end-to-end ofthe machine and showing parts of the case shiftingmechanism in lowercase position;

Figure 11 is a fragmentary horizontal sectional view substantially onthe irregular lines I ll I of Figure 9 and showing the parts in the samepositions as are shown in Figure 9; and

Figure 12 is a perspective view of a rockable latch member forming partof the case shifting mechanism, and its pivotal mounting element.

Introduction The invention is capable of being embodied in typewritingmachines of various kinds. For the purposes of illustration it is shownin connection with a typewriter the general construction and arrangementof many of the parts of which conform to the well known RoyalStandardtypewriter construction.

The typewriter illustrated comprises a main' the carriage B is urged to.move in the letter spacing direction under the control of an escapementmechanism unit generally\designated D.

, The escapement' mechanism comprises a fixed frame 6 which pivotallmounts a rocker 1 carrying a flxedjdog 8 and a pivoted dog 9 e005-erable in the usual manner with an escapement wheel Ill. The wheel I IIis connected through a pawl "I to a pinion ll normally in mesh with anescapement rack l2 mounted on the carriage. A universal frame l3includes arms l4 pivoted at Iii-l5 on a frame mounted bracket 46. Theuniversal frame is urged rearwardly by a spring I1 and includes auniversal bar It adapted to be i pulled forwardly upon the depression ofone of the usual key levers or the space bar. Adjustably mounted on theframe I3 is a pressure plate l9 adapted to push against a roller'Journaled at the lower end of a spring arm 2| carried by the rocker I.When the frame I3 is rocked clockwise as viewed in Figure 2, the plateis pushes the'roller 20 so as to rock the rocker 1 and 0perate theescapement mechanism D to effect a single letter spacing movement of thecarriage in the usual manner. The usualspace bar (not shown) 'havingthearms 2| is connected by a link M to the universal frame l3.

The escapement rack I2 is mounted on a ball 22 which is pivoted as at 23on the carriage end plates 24 and 25. Springs 23 espectively interposedbetween the carriage end plates and'rearwardly'extending arms 21integral with the ball .22 normally hold the rack l2 down in engagementwith the escapement pinion. i I, For permitting tabulating movements ofthe carriage B,

the bail 22 and the rack K2 are rocked clockwise as viewed in Figure 1by a tabulating rack lift lever pivoted on the main fram and beingformed with an ear 80 engageable with the bail 22 in the usual manner.The carriage is equipped with a tabular stop frame 3! mounting aplurality of key-settable stops (not shown);

Mechanism (not shown) cooperable with the stop fingers on the frame 3|may, for example,

be of the kind illustrated in the patent to Lewis the margin stop 36operates a line lock lever 40 so that when the carriage is brought torest by the center stop 39 the key levers cannot be operated. The linelock lever 40 is pivoted as at 4| on'the center stop 39 and is formedwith a downwardly extending arm 42, the lower end of which is connectedby a link 43 to one arm 44 of a lever 45 pivoted as at 46 on framebrackets 41. A spring 48 interposed between the lever arm 44 and a framemounted ear 49 urges thelever 45 and line lock lever 40 to non-linelocking position, movement of the parts under the urge of the spring 48being limited by engagement of a stop projection 50 on the lever 45 withthe frame A. Another arm 44 of the lever 45 is connected by a link 5| toa key lever blocking device, which in the form shown comprises a linelock plate 52 pivoted as at 53.

'I'he usual case shiftmember, in the form shown a type bar segment E, ismounted for vertical shifting 0n the frame A, and is equipped with apivotwire 54 which mounts the usual complement of type bar members. oneof which is shown at 55. Each type member 55 is formed with a short armit connected by a link 51. to an intermediate lever 58 pivoted as at 59on the key lever bracket carried by the frame A. The bracket 30 alsomounts the key levers 6| which are pivotedon a fulcrum shaft '32 and areurged upwardly against a stop 63 by retuming-springs 64. Each key deviceBI is connected by a link 65 to a front lever 36,pivoted as at 61 on theframe either in typewriters in which manually applied force is reliedupon for actuating the type bars, or in typewriters in which depressionof a key lever controls the action of power means which applies theactual force for moving the type bars to printing position. In theillustrative embodiment depression of a key lever is utilized to disablea restraining device so as to permit power operable means to apply theefiort for moving the associated type bar.

It will be understood that a key lever 6|, the type bar 55 andassociated parts shown in the drawings are representative of each of theplu-- rality of type bar actions and associated key mechanism althoughonly one complete type bar action is shown. The description of onecomplete type bar action is intended to serve as a description of theother type bar actions.

The similarity of the construction thus far de-- scribed to theconstruction of the known Royal Standard typewriting machine will beapparent to those familiar with the art. Some other parts to be referredto hereinafter also will be recognized as being of known construction.

General description In accordance with the invention claimed herein,power operated mechanism controlled by manually operable keys suppliesthe effort for the performance of the case shifting operation. A

' prime mover F, preferably an electric driving motor, transmitscushioned, power through a fluid coupling slip or impositive drivedevice G for normally urging the carriage B in the letter spacingdirection under the controlof the escapement mechanism D.

Each type bar action is loaded by power means comprising a spring 19which urges the associated type bar to move to printing position butwhich normally i prevented from acting by restraining mechanism H. Meansare provided for individually releasing the restraining mechanism Hassociated witheach key lever and type bar in response to operation ofthat key lever and movement of the carriage in the letter spaceingdirection.

Returning of the carriage B to line starting position is effected bytransmitting drive from the motor F through reversing gearing generallydesignated I controlled by mechanism not shown herein but which is fullydisclosed in the copending parent application Serial Number 493,- 450and disclosed and claimed in divisional apthe hubs I and IN.

plication Serial Number 525,058, died March 4, 1944.

Back spacing of the carriage through distances corresponding to apredetermined small number of letter spacing increments is eflected bydriving the carriage through the reversing gearing I under control of aseparate back spacing escapement mechanism unit J disclosed in the.parent application Serial Number 493,450 and disclosed and claimed inthe aforementioned divisional application Serial Number 525,058, fliedMarch 4, 1944. 7

Normally the type bar segment E is held in its upper position bymechanism generally designated K which is adapted to be released inresponse to depression of a shift key lever 82-for permitting thesegment to be moved downwardly by gravity. The segment E is restored toits upper position by lifting mechanism generally designated L operatedfrom the motor F under control of a shift release or reset key lever 83.

The platen C is adapted to be turned for line spacing by spring poweredmechanism M also disclosed in parent application Serial Number 493,450and disclosed and claimed in the aforementioned divisional applicationSerial Number 525,058, filed March 4, 1944.

Carriage driving mechanism The motor F is equipped with a shaft 80journaled as at 55-55 in the housing 88 or the reversing gear I. Theshaft 86 turns in the direction of the arrow 51 and, by means oi. a wormI82 and worm wheel I24, transmits drive through the reversing gear I toa chain gear lit which is driven in the direction of the arrow 89 foreffecting carriage letter spacing travel and in the direction of thearrow 90 for returning or back spacing the carriage.

The chain gear as drives a chain 9I which in turn drives a chain gear 92fast on a shaft 03 journaled at one end as at 94 in a frame bracket 95.Adjacent its other end the shaft is connected at 98 to the propellerelement 91 of the kinetic type fluid coupling G which may be of the kinddisclosed .in the patent to John J. Kittel No. 2,279,141, granted April7, 1942. The conpling runner element 90 houses the propeller 91 and thefluid 99, and is formed with hubs I00 and IM journaled respectively inbearings I02 and W3 carried y the bracket 95. .The end of the shaft 93adjacent the coupling G is journaled by bearings IIl I interposedbetween the shaft 03 and A bellows seal I05 prevents escape of fluidpast the hub IN. A gear I06 secured as at I01 to the runner hub I00meshes with a rack I08 mounted on the carriage end plates by bracketsI09 and H0.

Inoperation, when the machine is conditioned for the typing of a line,the motor F drives the coupling propeller 91 through the reversinggearing I in a direction tending to transmit drive through the fluid 99to rotate the runner 98 and gear I08 and move the rack I08 and carriageB in the letter spacing direction. The carriage can beheld at rest bythe escapement mechanism D because of the impositive drivecharacteristics of the fluid coupling G. Whenever the escapementmechanism is operated so as to release the carriage for letter spacingtravel, the fluid-transmitted effort becomes eilective for advancing thecarriage. by the escapement mechanism, the cushioning effect provided bythe fluid coupling G prevents the occurrence of any undesirable shock orstrain.

During letter spacing operation the chain gear II is driven in thedirection of the arrow 88.

For returning or back spacing the carriage, the gearing I is set tocause the chain gear 88 to rotate in the direction of the arrow Thiswill drive the propeller '1 of the coupling G in the opposite direction,thereby reversing the direction of rotation of the gear Ill and drivingthe rack I08 and carriage in the reverse or return direction.

Typin mechanism The mechanism for operating and tor controlling theoperation of the type bars 55 is claimed in the parent applicationSerial Number 493,450 and is similar in some respects to mechanismdisclosed in the co-pending application of John J. Kittel, Serial Number493,449, filed July 3, 1943. Depressing of a key lever II is not madeeflective for applying manually exerted force for moving the type bar 55on its printing stroke, but is utilized for releasing the restraint on aspring 19 connected between the intermediate lever 58 and an adjustingplate I51. pivoted as at I58 on the frame A. When released, the spring19 contracts and rocks the lever 58 counterclockwise, thereby swingingthe type bar 55 to printing position.

Depending from a curved slot I55 in the lever 58 is a link I50 piv tedat its lower end to a cam follower lever iii in turn pivoted as at I82on the 1 frame A. The lever iti is equipped with an antifriction rollerI63 which normally is held against upward movement by the restrainingface I66 of a releasable bar lock keeper itb pivoted as at I56. Theroller m3 also is releasably restrained against upward movement by thecrest of one of the eight lobes ifi'i on a resetting member comprising acam I58 secured to a shaft I59 journaled on the typewriter frame A bysuitable hearings on supporting plates I10 and Iii. A detent roller Q12mounted on a lever I13 pivoted as at I14 on the supporting plate H0 isurged by a spring I15 anchored on a stud H6 into contact with a detentwheel I11 secured to the cam shaft I69 by a set screw M1 for yieldablymaintaining the cam I58 I counterclockwise thereby moving the keeperface When the carriage is brought to rest with the crest of a lobe I81directly above the roller I53. Thus, both the bar lock keeper IE5 andthe cam I88 normally prevent rising of the roller I 53 and thereforenormally restrain the lever 58 from being rocked by the spring 19. In

order to discontinue the restraint of both the keeper I65 and theresetting member I58 and permit the spring 19 to contract and drive thetype bar to printing position it is necessary to displace therestraining face I60 of the keeper I65 from above the roller I63 andalso to rotate the cam I68 so as to allow the roller to move into thedepression between two cam lobes IE1.

The barlock keeperl55is adapted to be rocked upon depression of theassociated key SI for displacing the restraining face I64 from abovetheroller I83. For this purpose an arm I18 on the keeper I65 isconnected by a link- 118 to the key operated lever 66. Thus, upondepression of the key BI, the link will rock the lever 55 clockwise topull on the link I18,and rock the keeper I65 I64 away from the rollerI83.

Thereafter, to enable the spring 19 to actuate the lever 58, link 51 andtype ha: 55, the cam I58 is rotated one-eighth of a revolution. Whilethe depresson between the lobe I51 last positioned above the roller I83and the next adjacent lobe is presented above the roller the lever IBIis free to rock clockwise, Hence the spring 19 contracts and engaging afixed part of the frame A. If the screw I19 is turned to rock theadjusting plate I51 clockriage travel.

wise as viewed in Figure 2, the springs 19 associated with therespective type bars will be subjected. to additional tension so as tobe capable of swinging the type bars 56 into printing position with moreforce. Adjustment of the tension of the springs 19 is accompanied by avariation in the force reqi'iff''d to depress the key levers 6|, thusrequiring a heav er touch to effect operation of a type bar. This isbecause additional tensionin of thesprings'19 causes the rollers I-83 tobe held against the keepers I65 with greater force, thereby requiringadditional manually applied effort for moving the keepers I85 fromengagement with the rollers I83.

For operating the escapement mechanism D in response to the depressionof a key lever 8|, a supplemental universal bar I88 is pivoted at I68and is engaged by projections I8I formed respectively on thebar keepersI65. An arm I82 on the supplemental universal bar I88 is connected tothe I escapement frame I3 by a pull rod I83 having its rear end hookedat I84 to embrace the rod I6 on the universal frame I3. .Thus, when akey lever 6| is depressed, the associated keeper I65 is swungcounterclockwise to the position shown in Figure 2, thereby rocking thesupplemental universal bar I88 counterclockwise and swinging thuniversal frame I3 clockwise to actuate the escapement mechanism. Whenthe key lever is released, the springs I1 and 84 will contract torestore the parts to their, positions.

The cam shaft I69 is rotated step-by-step in response to carriage letterspacing travel and moves through one-eighth of a revolution in responseto each letter spacing increment of car- Connections between thecarriage driving mechanism and the cam shaft I69 in clude a gear I84secured to the front end of a shaft I85 and meshing with the carriagedriving gear I88. A gear I88 secured to the rear end of the shaft I85meshes with a gear I81 rotatable on a shaft I88 and meshing with a gearI89 fast on a, shaft I98 journaled as at I9I and I82. A sleeve I93freely rotatable on the shaft I98 is fast with a ratchet wheel I94engageable by a pawl I95 carried on an arm I86 fast with the shaft I88.A spring I91 urges the pawl I95 into operative. engagement with theratchet wheel I94. A spiral gear I98 fast with the sleeve I93 mesheswitha spiral gear I99 secured to the cam shaft I69. When the carriagemoves in the letter spacing direction, the gears I86, I84, I88, I 81,and I89 rotate the ratchet shaft I98 in the direction of the arrow 288(Figure '7) and move the one way drive device I 94-I95 and sleeve I93through one-eighth of a complete revolution for each single letterspacing movement of the carriage. Drive is transmitted from the sleeveI93 through the spiral gears I98 and I99 to rotate the cam shaft I89also through one-eighth of a revolution for each letter spacingincrement of the carriage movement.

Normally, each type bar actuating spring 19 is restrained by engagementofthe associated roller I63 with a lobe I61 and with the associatedkeeper restraining face I84. When a key lever 6I is depressed, theassociated keeper I85 is swimg to the position shown in Figure 2,thereby rocking the supplemental universal bar I88 and operating theescapement mechanism D. in the manner previously described. When thecarriage moves in response to operation of the escapement mechanism thecam shaft I69 is rotated as explained above. As the cam lobe I81 whichwas in contact with the roller I63 prior to operation of the key lever6| moves from above the roller I63, a cam depression will be presentedabove the roller I83 and the roller will be enabled to rise so as topermit the spring 19 to move the type bar 55 to printing position, theretreating cam lobe piloting the. type bar to typing position. The typebar will reach printing position when the cam shaft has moved throughone-sixteenth of a revolution, the parts then being positioned as shownin Figure 2. During the next one-sixteenth of a revolution of the camshaft I89, the next or following cam lobe I61 will engage the roller I63so as to move the arm I6I downwardly, thereby restoring the type bar 55to its position of rest, reloading the spring 19, and enabling therestraining face I64 of the keeper I85 to move over the roller I83. The

parts then will have been returned to their normal positions and theescapement mechanism D will have arrested the carriage and the cam shaftI 69.

As shown in Figure 2, the shape and size of the cam I88, the mounting ofthe type member 55, and the connections between the roller I 83 and thetype member 55 are so interrelated that the roller I83 is out of contactwith the cam I88 when the type member 55 reaches typing position. Thusthe cam I68 is effective for restrain ing or piloting the type memberduring part of the typing stroke but not during the last part of thestroke. spring .19 can be effective for varying the force of the typeimpact.

In the event it is necessary for a service man to perform a type baraligning operation, requiring the manual raising and holding ofindividual type bars in or near printing position, the cam shaft I89 isset to position depressions between cam lobes I81 of each cam I68directly above the rollers I63 associated with the respective type bars55. I69 in this position, the set screw I11 is loosened and the detentwheel I11 is slid to the left, as viewed in Figure 6, and is turnedtogether with the cam shaft I69 until a pin I11 on the detent wheelenters a hole I11 in the supporting plate I18. The settable means I11I11 will position the cams I88 with cam depressions immediately belowthe rollers I83 as shown inFigure 2, that is with the cams displacedangularly one-sixteenth of a revolution from the normal position. Anytype bar 55 may then be manipulated by hand after releasing theassociated bar lock keeper I85 by depressing the key lever 6|.

Case shifting mechanism The case shifting segment member E is biased toa. lower position by its own weight but normally is held in its upperposition for the typing of small letters by the releasable means Kincluding two links 288 pivoted to the segment as at 28! and pivoted asat 282 to a shift frame generally designated 283. The shift frame 283comprises arms-284 and 285 connected to a tie rod 286 and respectivelybeing fitted with pintles Consequently the adjustment of the 1 Forsetting the cam shaft 23! and 233 journaledin'frame bearings 239 and230. The shift frame arm 234 is formed with a vertical extension 29|equipped with a cam follower roller, 292 normally engaged by the cam and293 of a secondary release latch or interponent 294 pivoted on the tierod I93 and on a shouldered screw 295 (see Figures and 11) extendingthrough the mounting plate Ill and into the tie rod I33.

The interponent latch 294 comprises spaced arms 236 and 291 connected bya cross bar 293, and an extension 299 on the arm 291. A spring to rockthe lever 326 clockwise as viewed in Figure 300 interposed between theextension 299 and a post 30l on the mounting plate |1| urges the latch294 to rock clockwise from the normal position' shown in Figure 1.However the latch 294 normally is held in its Figure 1 positionbyengagement of a roller302 on the arm 293 with a retainer 303 on asegment release latch or retainer device 304 which is pivoted on aheadless screw 305 threaded at 309 in the frame A. A link 301 is pivotedas at 303 to the shift key 32 and is pivoted at 309 to the segmentrelease latch 304. Asshown clearly in Figure 12, the release latch 304-comprises spaced arms H0 and 3 connected by a cross bar 3|2, theretainer 303 extending upwardly from the arm 3l0.

In operation, when the shift levei-- 82 is depressed and rockedcounterclockwise as viewed in Figure 1, the link 301 will be retractedto rock the segment release. latch 304 clockwise to the position shownin Figure 9. With the retainer 303 in this displaced position, theroller 302 can move downwardly, thereby enabling the spring 300 to rockthe secondary release latch 29.4 to the position shown in Figure 9. Thiswill displace V 82 is released it will be returned to its normalposition by a spring 82*.

The shifting of the segment E is cushioned by shock absorbers providedat each end of the segment andreachcomprising a pin 3|! having threadedconnection with the segment as at 3"! and passing through a frame lug319. Cushioning springs 320 are mounted on each pin 31'! both above andbelow the associated lug 3|9, the positions of the springs beingvariable by adlusting nuts 32L Means actuated by power supplied from themotor F through the fluid coupling G are provided for returning thesegment to its upper position. A resetting cam 322 is keyed as at 323 tothe cam shaft "59 so as to rotate therewith and to be slidalble axiallythereon. A spring 324 interposed between the mounting plate Ill and theresetting cam 322 yieldably urges the cam to a normal position shown inFigure 11 wherein the cam is displaced axially out of the plane of a camfollower roller 325 mounted on the arm 291 on the secondary releaselatch 294. During normal typing operation the cam 322 rotates with thecam shaft I53 but has no effect upon the roller 325.

For shifting the cam 322 into position for cooperation with the roller325, a lever 326 pivoted as at 32! on a bracket 328 is equipped with apm 329 extending into a groove 330 in the hub of 292 to the right asviewed in Figure 9 to rock the 11. The pin. 323 will then shift the cam322 into the plane of the interponent roller 325. While the shirt resetlever 83 is held depressed the operator strikes a key lever lil. Thiseffects a letter spacing carriage step movement accompanied by a steprotation of the shaft Hi9 and the resetting cam 322. When the camshaftand cam 322 are rotated a lobe on the cam will raise the roller 325,thereby rocking theinterponent 294 counterclockwise from its Figure 9position to its Figure 1 position. The cam end 283 will force the rollershift frame 283 back to its normal position as shown in Figure 1. Thesegment E will be returned to its upper or normal position just a littlebefore the type bar reaches the printing point. The spring 32 will thenreturn the shift .key 82 and the segment release latch 304 to theirnormal positions with the retainer 303 again disposed under the roller302 on the secondary latch 294,

the parts then all being set for the typing of small letters with thesegment E supported in its upper position. The cam-urging spring 321acts through the cam 322, lever 326, and link 33| to return the shiftrelease lever 33 to its normal position.

Safety lock mechanism Means claimed in the copending divisionalapplication Serial Number 525.060, filed March 4, 1944, are provided forpreventing operative depressing of more than one key lever 6| at thesame time, thereby making it impossible for two or more type bars tocollide and/or jam. The usual and rocks the blocking part 52 rearwardlyfrom its normal forwardly offset position to the position shown in fulllines in Figures 2 and 3. The

line lock plate 52 will then be disposed directly under the toes 335 ofthe aligned key lever abutments 334 so as to prevent operative downwardmovement of the other key levers. This operation of the safety lock doesnot disturb the line lock lever 40 because the link 5| interposedbetween the line lock plate 52 and the line lock lever 40 has its frontend connected to the line lock plate 52 by a one way drive connectionincluding a part 335 of the link 5| and a slot 331 in the line lockplate. Thus rearward movement line locking plate caused by depression ofa key lever 6| will not move the link 5|.

The safety lock device prevents the operation of more than one key leverwhen the motorF is running and also prevents the depressing of more thanone key lever when the motor is shut off. Thus damaging of the type barmechanism is avoided.

- Ribbon spool drive The usual ribbon spool driving shaft 338 is drivenfrom the motor F through the fluid coupling G and gearing I. A pinion339 meshes with the gear Hi6 and transmits drive in one direction onlythrough an enclosed ratchet device 340 to a shaft all which is connectedthrough a uni-- versal coupling 342 to the ribbon spool driving shaft338. a

' Summary It is apparent that mechanism embodying the' inventiondisclosed herein provides for the smooth performance with minimum manualeffort of of which need not be changedat all.

The fluid drive connection between the prime mover F and the type barspring resetting mechanism, the traveling carriage, and the caseshifting mechanism provides for both rapid and smooth operation freefrom undesirable shocks and noise. The flexible, cushioning drivetransmitting characteristics of the fluid coupling are especiallyadvantageous in a construction in which the power for performing severaltypewriting functions is supplied by a single motor or prime mover.There always is available an adequate source of smooth, cushioned powerfor the performance of. any one or the simultaneous performance of morethan one operation.

The mechanism described with reference to the drawings embodies theinvention in the form now preferred, but it is evident that changes maybe made without departing from the invention as defined in the claims.

I claim:

1. In a typewriter or like machine, a case shift member movableselectively to two positions and being biased toward one of saidpositions; a cam follower connected to said member; a cam en-- gageablewith said follower and,normally positioned to maintain said member inthe other of said positions against said bias; a shift key;

means responsive to operation of said shift key for moving said cam toenable said follower to move under the urge of said bias and to thuspermit movement of said shift member to said one of said positions; ashift reset key; and power driven means responsive to operation of saidshift reset key for actuating said camto move said follower against saidbias and to thereby move said shift member back to said other of saidpositions.

2. In a typewriter or like machine, a case shift member movableselectively to two positions and being biased toward one of saidpositions; a cam follower connected to said member; a cam engageablewith said follower and normally positioned to maintain said member inthe other of said positions against said bias; a retainer device forreleasably holding said cam in its normal position; a shift keyconnected to said retainer device and being op rable for moving saidretainer device to release said cam and to thus permit movement of saidshift member under the urge of said bias to said one of said positions;a shift reset key; and power driven means responslve to operation ofsaid shift reset key for actuating said cam to move said followeragainst said bias and to thereby move said shift member back to saidother of said positions.

3. In a typewriter or like machine, a case shift member movableselectively to two positions and being biased toward one of saidpositions; a first rockable member connected to said case shift member;a cam follower on said first rockable member; a second rockable member;a cam on said second rockable member adapted when in normal position toengage saidfollower for holding said shift member in the other of saidpositions; a roller on said second rockable member; a third rockablemember having a retainer face normally engaging said roller for holdingsaid second rockable member in its normal position; and key controlledmeans for rocking said third rockable member topermit movement of saidroller and said second and first rockable members and consequentmovement of said shift mem- I ber to-said one of said positions.

4. In a typewriter or like machine, a case shift member movableselectively to two positions and being biased toward one of saidpositions; a first rockable member connected to said case shift member;a cam follower on said first rockable member; asecond rockable member; acam on said second rockable member adapted when in normal position toengage said follower for holding said shaft member in the other of saidpositions; a roller on said second rockable member; a third rockablemember having a retainer face normally engaging said roller for holdingsaid second rockable member in its normal position, key controlled meansfor rocking said third rockable member to permit movement of said rollerand said second and first roc able members and consequent ,movement ofsaid shift member to said one of said positions; 'and key controlledpowerdriven means for moving said second rockable member back to normalposition to thereby cause said cam to'drive said follower and said firstrockable member for moving said shift member back to said other of saidpositions.

5. In a typewriter or like machine; a case shift member movableselectively to two positions and being biased toward one of saidpositions; and mechanism for moving said member from said one of saidpositions to the other of said positions comprising an interponentoperatively connected to said shift member, a follower on saidinterponent; a shaft; a cam constrained to rotate with said shaft butbeing movable axially thereon into and out of position for cooperationwith said follower for actuating said interponent; means for rotatingsaid shaft; and key controlled means for shifting said cam into and. outof position for cooperation with said follower.

6. In a t: pewriter or like machine; a case shift member movableselectively to two positions and being biased toward one of saidpositions; and mechanism for moving said member from said one of saidpositions to the other of said positions comprising an interponentoperatively connected to said shift' member, a follower on saidinterponent; a shaft; a cam constrained to ro-' tate with said shaft butbeing movable axially thereon into and out of position for cooperationwith said follower for actuating said interponent; a spring yieldablyholding said cam out of its position of cooperation with said follower;key actuated mechanism for shifting said cam into said position; amotor; and connections including an impositive drive fluid coupling saidmotor and said shaft.

7. In a typewriter or like machine, a case shift member movableselectively to two positions and being biased toward one of saidpositions; a flrst rockable member connected to said case shift member;a cam follower on said first rockable member; a second rockable member;a cam on ,said second rockable member adapted when in normal position toengage said follower for holding said shift member in the other of saidpositions; a roller on said second rockable member; a third rockablemember having a retainer face normally engaging said roller for holdingsaid second rockable member in its normal position; key controlled meansfor rocking said third rockable member to permit movement of said rollerand said second and first rockable members and consequent movement ofsaid. shift member to.

said one of said positions; a motor driven shaft; a cam follower on saidsecond rockable member; a resetting cam constrained to rotate with saidshaft but being movable thereon into and out of position for cooperationwith the cam follower on said second rockable member for actuating thelatter to; move said shift member to said other of its positions; andkey controlled means for shifting said resetting cam into and out of itsposition for cooperation with said cam follower. 8. In a typewriter orlike machine, a set of printing members; key-controlled power means formoving said printing members to printing position; means for. retractingsaid printing members from printing position; a case shift mem-' bermovable selectively to two positions; releasable means for holding saidcase shift member in one of said positions; shift control means forreing effective for moving said printing members to a printing positionindependently of transmission of drive by said fluid coupling shiftreset control means for effecting transmission of drive from said motorthrough said fluid coupling to actuate the returning means and to thusmove said case sh'ift member to said one of said positions; and meansfor moving 'said releasable means to again hold said case shift memberin said one of said positions. v

9; In a typewriter or like machine, a set of printing members;key-controlled power means for moving said printing members to printingposition; means for retracting said printin members from printingposition; a case shift member movable selectively to two positions andbeing biased toward one of said positions; latch means for holding saidcase shift member in the other of said positions; shift key-controlledmeans for releasing said latch means to enable said case shift member tobe moved by said bias fecting transmission of drivefrom saidmotorthrough said coupling to actuate said returning means and to thus movesaid case shift member to said other of said positions; and means forthen moving said latch means to again hold said case shift member insaid other of said positions.

10. In a typewriter or like machine, a set of printing members;key-controlled power means for moving said printing members to printingposition; and means for retracting said printing members from printingposition; 'a case shift member movable selectively to two positions andbeing biased toward one of said positions; latch means for holding saidcase shift member inthe other of said positions; shift key-controlledmeans for releasing said latch meansto enable said case shift member tobe moved by said bias \to said one of said positions; returning meansfor moving said case shift member from said one of said positions tosaid other of said positions;

a motor; a kinetic type fluid coupling between said motor and saidreturning means, said power means being effective for movingsaid-printing members to printing position independently of 5transmission of drive by said impositive drive coupling shift resetkey-controlled means for effecting transmission of drive from said motorthrough said coupling to actuate said returning means and to thus movesaid case shift member to said other of said positions; and means forthen moving said latch means to again hold said case shift member insaid other of said positions. 11. In a. typewriter or like machine, aset of printing members; key-controlled power means :15 for moving saidprinting members to printing position; means for retracting saidprinting members from printing position; a case shift member movableselectively to two positions and being biased toward one of saidpositions; latch means for holding said case shift member in the otherto said one of said positions; returning means for moving said caseshift member from said one of said positions to said other of saidpositions; a motor; an impositive drive coupling between said motor andsaid returning means, said power means being effective for moving saidprinting members to printing position independently of transmission ofdrive by said impositive drive coupling shiftreset key-controlled meansfor efof said positions; shift key-controlled means for releasing saidlatch means to enable said case shift member to be'moved by said bias tosaid one an impositive drive coupling between said motor and saidreturning means; key actuated means for controlling said returningmeans, said power means being effectiv for moving said printing membersto printing position independently of transmission of drive by'saidimpositive drive coupling shift reset key-controlled means for effectingtransmission of drive from said motor through said coupling to actuatesaid returning means and to thus move said case shift member to saidother of said positions; and'means for then moving said latch means toagain hold said case shift member in said other of said positions.

12. In a typewriter or like machine, a set of printing members;key-controlled power means for moving said printing members to printingposition; means for retracting said printing members from printingposition; a case shift member movable selectively to two positions andbeing biased toward one of said positions; a cam follower connected tosaid case shift member; a cam engageable with said follower and normallpositioned to maintain said case shift member in the other of saidpositions; a shift key; means responsive to operation of said shift keyfor effecting movement of said cam to enable said follower to move andto thus permit movement of said case shift member to said one of saidpositions; a shift reset key; a motor; and means controlled by saidshift reset key and including an impositlve drive fluid coupling fortransmitting drive from said motor to said cam'for moving said caseshii't member back to said other of said positions, said power meansbeing eflective for moving said printing members to printing positionindependently of transmission or drive by said fluid coupling.

13. In a typewriter or like machine, a set'bf printing members;key-controlled power means for moving-said printing member to printingposition; means for retracting said printing members from printingposition; a case shift member movable selectively to two positions andbeing biased toward one of said positions; and mechanism for moving saidcase shift member from said one of said positions to the other of saidpositions comprising an interponent operasaid follower for actuatingsaid interponent to move said case shift member; a motor; drivingconnections including an impositiv drive fluid coupling between saidmotor and said cam; and

thereby move said case shift member to said other of said positions,said power means being effective for moving said printing members toprinting position independently of transmission of drive by said fluidcoupling.

14. In a typewriter or like machine, a set 01' printing members;key-controlled power means for moving said printing members to printingposition; means for retracting said printing members from printingposition; a case shift member movable selectively to two positions; aspring partially counterbalancing the weight of said case shift memberbut not sufllciently to prevent said case shift member from moving bygravity to its lower position; lifting means including a motor, and animpositive drive fluid coupling for transv mitting drive from said motorto said case shift member for moving said case shift member to its upperposition; releasable means for holding said case shift member in itsupper position; and key means for controlling said lifting means andsaid releasable means, said power means being eilective for moving saidprinting members to printing position independently of transmission ofdrive by said fluid coupling.

JOHN JOSEPH KIII'EL.

